Answer:
D. The system is in echelon form.
Step-by-step explanation:
Check attachment
Answer:
- Domain:
- Range:
![(-5, 4]](https://tex.z-dn.net/?f=%28-5%2C%204%5D)
- Is the relation a function? - Yes
Step-by-step explanation:
The domain is the set of x-values and the range is the set of y-values.
A relation is a function if each value of x maps onto no more than one value of y.
Answer:
b. t = 10.5 seconds.
Step-by-step explanation:
l = 0.81t^2
90 = 0.81t^2
t^2 = 90 / 0.81
t^2 = 111
t = 10.5 seconds.
You have to divide your friends weigh by 1.2 to get the result. : if you were 1.2 times taller than they, you would multiply, so the oppisite is dividing!
so it will be 64.5/1.2=53.75.
Total cost=costofhaircut+tip
tip=costofhaircut times percent tip
percent tip=15%
percent means parts out of 100
15%=15/100=0.15
cost of haircut=16
tip=16 times 0.15=2.4
total cost=16+2.4=18.4
total cost=$18.40
